Machine for making pickers



W. A. PARMENTER.

MACHINE FOR MAKING VICKI-IRS.- APPLICATION FILED nov. 4. 1920.

1,3925259; Patented Qpt. 27",192'1. I

INVENILDYI UNITED STATES PATENT I E- WILLIAM A. PARMENTER, or BROCKTON, MASSACHUSETTS, ASSIGNOR T0 c, rumor: ooMrANY, or BROCKTQN, MASSACHUSETTS, A conroRA'rIoN 0F MASSA.

CHU'SETTS.

To aZlwhmn it may concern:

Be it known that I, WILLIAM "A. PAR- MENTER, citizen of the United States, residing at Brockton, county of Plymouth, State of Massachusetts, have invented a certain new and useful Improvement in Machines 'for Making Pickers, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention has for its object a machine forthe manufacture of pickers such as are used on the upper end of the picker staff of looms, these pickers being composed of leather or'cowhide and having heretofore been manufactured entirely by hand. The manufacture of pickers as heretofore practised has required the expenditure of a great deal of muscular strength, particularly in wrapping or folding a strip 'of leather into shape. My present invention has for its object to provide a machine or device by which this operation may be performed without any considerable exertion on the part of the operator. The device embodying my invention is very simple and enables the operator to produce pickers which are more uniform in character and at a much more rapid rate than has heretoforebeen possible. v

The invention will be fully understood from the followingdescription when taken in connection with the accompanying drawings, and the novel 'featuresthereof will be pointed out and clearly defined in the claims at the close of this specification.

In the drawings, Figure 1 s a side eleva-i tion of a picker of the kind to be manufaccured by the employment ofthe machine embodying my invention, the picker beingv applied totheupperend of the picker staff.

I Fig. 2 is a top plan view of the picker shown in Fig. 1.

Fig; 3 is a side elevation of the machine embodying my invention. 1

Fig. 4 is a top plan view of the machine. Fig. 5 is a side elevation of the front, part of the machine-showing the position of'lthe parts at one stage during the manufacture of the picker. f

Fig. 6 shows the position of the parts shown'in Fig. 5 as the picker is about to be withdrawn from the mandrel.

Referring now to the drawings, at 11'is shown a bracket by means of which the machine is bolted to a bench. -This bracket Specification of Letters Patent.

MACHINE FOR MAKING PIcKEBs.

comprises a member a which is secured to the bench and a member 6 at right angles thereto. Said members lie in vertical planes. Secured to the member I) are two guide rods '12and 13 which'project forwardly toward the peratOrwh stands inlfront of the machine. On the front ofthe guide rods 12 and 1 3 is secured a crossbar 14. The bracket 11, guide rods 12 and 13 and crossbar 1 1 from a heavy rigid structurecapable of supporting the Strain to which the machine is subjected. On a side of thecrossbar 14 is located a boss 0 within whichis an axle 15 provided with a crank 16 and a handle 17 by which the axle may be rotated; Secured to the'e'nd ofthe axle 15 which is opposite the handle 17 is amandrel 18 which is of the shape of the hole 01 -to'be formed in the picker blank. This mandrel is rectangular 1n section'and tapers slightly, the smaller end-being that toward the left of the operator,.as seen in Fig. a. The mandre1f18 leather in the manufacture of the picker is bent sharply overthisedge and thereby preventedfrom' pulling out of theslot by the I l atented-Sept. 27, 1921. Application filed November 4, 1920. Serial No. 421,793.

strain to which it is subjected. The crossbar 14 has formed in its vertical slot 20 which is slightly larger than thecross-section of the mandrel; This slot extends onlypart way through'ithe crossbar 14', asgwill be. seen ,bythe dotted lines 111' Fig 4. This slot is of a size toreceivethe mandrel and to per mit the mandrel to be drawn'to theright, as viewed in Fig.- 4,'for the'purpo'se of withdrawing the picker blank'from the mandrel after the operationof winding the picker blank has been completed.

0n the guide bars 12 and13is located a crosshead 2 1 which carries a stud 2 "on i which is revolubly mounted a roller'3. f This roller is of the diameter suchthatit extends beyond the front edge of the crosshead 21.

Betweenthe crosshead. 21 and the member b. of the bracket 11, is located a heavyspring.

2a which pushes the roller 3 forcibly'toward the mandreh In practice, I find it con venient toplace the spring around a guide rod 25 secured at its front endgto the crosshead 21 and freely slidable-in a thimble 6 which is screw-threaded into the member b 25 serve to prevent displacement of the spring 24.

. At 27 is shown a stop secured to'a leaf spring 28 by a screw 29. The leaf sprlng 28 is secured to the crosshead 21' by a screw 30. lhis stop 27 is so located that it is normally in the space between the crossbar let and the crosshead 21 and serves to hold the picker blank away from the roller when the picker blank is about to be removed from the mandrel. i v

The operation of my machine is asfollows :The strip of leather f shown in dotted lines in Fig. 1 from which a picker blank is to be made, has a skived or beveled surface, as shown at g and is properly tempered, so that it is in a relatively soft, pliable condition. The square end of the blank is inserted in the slot 19, thema ndrel being at this time in the position shown in Figs. 3 and 4:. The operator then turns the crank in the direction indicated by the arrow inv Fig. 3, and at the sametime holds the leather sufliciently to steady itand prevent its displacement from the slot.;

The rotation of the mandrel 18 brings the leather in contact with the roller 3, and the spring 24 forces theroller against the leather. The leather is, therefore, bent and wound about the mandrelinto the shape shown in Figs. 5 and 6. When the machine reaches the position shown in Fig. 5, the crossbar Hand the'guide 21 which carries the roller 8 are most widely separated and the leather on the mandrel 18 is subjected to themaximum pressure from the spring 24. .The operator stops the movement of the machine at this position and turns down the skived or beveled end 9 ofthe leather into contact with the previous layer of leather and drives in a tack 7 as shown in Figs. Sand 6. This tack is sufficient to hold the picker blank inthis condition until the parts have. been finally secured in place by rivets. .32 during subsequent operations.

.The operator then turns thehandle 17backward through ninety degrees, and the stop 27 which has dropped into :the POSltIOII shown in Fig 6,. prevents the roller 3 from following the leather, thus making it'easier for :the operator. to. remove the blank from the mandrel.

. i To remove the blank. from the mandrel, the operator pulls the handle 17,.the axle 15 and the mandrel 18 mounted. thereonto the right, as viewed. in Fig. 4, the end of the fmandrel. entering the slot in. the ,cross- ,barlet as the picker "blank slips off the end v ofthermandrel. A I

vThe piclmr blank is then ready to be jected to subsequent operations, including the insertion member 33, the riveting, and

the pressing and molding into final shape, these operations having no bearing on the use of the machine embodying my invention.

v'What I claim is 1. A machine-of the character described comprising a mandrel on which the strip is to be wound, a crossbar, a plurality of guide member's projecting from said crossbar, a crosshead slidably' mounted on said guide members so as to slide toward and fromsaid crossbar, a pressure roller rotatably mounted on a shaft projecting laterally from said slidable crosshead, and a springwhich exerts pressure on said crosshead to hold said roller in yicldingengagement with the strip being wound on the mandrel.

2. A machine of the character described comprising a mandrel on which the strip is to be wound, a crossbar, a plurality of guide :members pro ecting from said crossbar, a

crosshead slidably mounted on said guide members so as to slide toward and from said crossbar, a pressure roller rotatably mounted on a shaft projecting laterally from said slidable crosshead, a spring". which exerts pressure on saidcrosshead to holdv saidroller in yielding engagement with the strip being wound on the mandrel, a bracket with which .said guide. members are rigidly connected,

and a-rod rigidly connected at one end with said slidable crosshead, the other end being slidable in a slot in said bracket.

3. A machine of the character described comprising a mandrel on; which the. strip is to, be wound, a crossbar, a plurality of guide members projecting from saidcrossbar, a

crosshead slidably mounted on said guide members s0 as to slide toward and from said crossbar, a pressure roller 'rotatably mount- .ed on a shaft projecting laterally from said slidable crosshead, a spring which exerts pressure on said crosshead to hold said roller in yielding engagement withthe strip beingwound on the mandrel, a bracket with which said guide membersare-rigidl-y connected,:and a rod rigidly connected at one .end with said slidable crosshead,- the other end being slid-able in av slot insaid bracket,

said pressure spring being mounted on said and from the periphery of the mandrel, and.

a spring to forcet e roller toward the mandrel, the crossbar being formed with an elongatedslot into which themandrel is receivable when the mandrel. is in position 1 for its elongated diameter 'to-be presented to the e ong d diameter of the slot.

5. A machine of the character described comprising a. mandrel, an axle for the mandrel, a crossbar supporting the axle, said crossbar being slotted to permit endwise movement of the mandrel when in one position, means for rotating the mandrel, and a pressure member adapted to exert pressure on the strip as the mandrel is rotated on said axle.

6. A machine of the character described, comprising fixed guide members, a crossbar thereon, a rotatable mandrel mounted on the crossbar, a crosshead slidable on the guide members, a spring to force the crosshead toward the crossbar, a roller on the guide, and a stop insertible between the crossbar and the crosshead.

7. A machine of the character described comprising fixed guide members, a crossbar at the end thereof, a mandrel, an axle for the mandrel passing through the crossbar and rotatable therein, said crossbar be ing slotted to permit the mandrel to slide lengthwise of the axle when in one position, a crosshead slidable on the guide members, a spring to force the crosshead toward the crossbar, a roller on the crossbar, and means for rotating the mandrel.

8. A machine of the character described comprising a bracket, a plurality of parallel guide rods projecting therefrom, a crossbar fixedly mounted on said rods, a crosshead slidably mounted on said rods intermediate said bracket and said crossbar, a mandrel mounted on an axle which passes through said crossbar, a roller mounted on a shaft projecting from said crosshead, and a spring which presses the crosshead toward the crossbar so as to press the roller against the windings on the mandrel.

9. A machine of the character described comprising a bracket, a plurality of parallel guide rods projecting therefrom, a crossbar fixedly mounted on said rods, a crosshead slidably mounted on said rods intermediate said bracket and said crossbar, a mandrel mounted on an axle which passes through said crossbar, a roller mounted on a shaft projecting from said crosshead, 'a spring which presses the crosshead toward the crossbar so as to press the roller against-the windings on the mandrel, and a rod on which said spring is mounted, said rod having one end fast to said crossbar and the other end slidable in a slot in said crosshead.

In testimony whereof I afiix my signature.

WILLIAM A. PAR-MENT'ER. 

